Mercurial > libjeffpc
changeset 812:59a473863eaa
cmake: add a way to force 64-bit build
This is useful on OSes that support 64-bit binaries but default to 32-bit.
To force 64-bits, pass FORCE_64_BIT_BUILD to cmake. E.g.,
$ cmake . -DFORCE_64_BIT_BUILD=1
Signed-off-by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
author | Josef 'Jeff' Sipek <jeffpc@josefsipek.net> |
---|---|
date | Sat, 18 Jul 2020 10:16:00 -0400 |
parents | 64ad3a9d4837 |
children | d563f6d72c1e |
files | CMakeLists.txt cmake/64-bit.cmake |
diffstat | 2 files changed, 33 insertions(+), 0 deletions(-) [+] |
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--- a/CMakeLists.txt Sat Jul 18 11:05:33 2020 -0400 +++ b/CMakeLists.txt Sat Jul 18 10:16:00 2020 -0400 @@ -49,6 +49,7 @@ set(CMAKE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/cmake") +include(cmake/64-bit.cmake) include(cmake/config.cmake) include(cmake/mapfile.cmake) include(cmake/test.cmake)
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/cmake/64-bit.cmake Sat Jul 18 10:16:00 2020 -0400 @@ -0,0 +1,32 @@ +# +# Copyright (c) 2020 Josef 'Jeff' Sipek <jeffpc@josefsipek.net> +# +# Permission is hereby granted, free of charge, to any person obtaining a copy +# of this software and associated documentation files (the "Software"), to deal +# in the Software without restriction, including without limitation the rights +# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +# copies of the Software, and to permit persons to whom the Software is +# furnished to do so, subject to the following conditions: +# +# The above copyright notice and this permission notice shall be included in +# all copies or substantial portions of the Software. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. +# + +if(FORCE_64_BIT_BUILD) + message("-- Forcing 64-bit build") + set(CMAKE_EXE_LINKER_FLAGS "-m64") + set(CMAKE_SHARED_LINKER_FLAGS "-m64") + add_compile_options(-m64) + + # necessary for check_type_size, etc. + set(CMAKE_REQUIRED_FLAGS "-m64") + set(CMAKE_REQUIRED_LINK_OPTIONS "-m64") +endif()